Saint-Paul-sur-Ubaye (French pronunciation: [sɛ̃ pɔl syʁ ybaj], lit.

"Saint Paul-on-Ubaye"; Vivaro-Alpine: Sant Pau d'Ubaia, before 1998: Saint-Paul)[3] is an alpine commune on the Italian border in the Alpes-de-Haute-Provence department in the Provence-Alpes-Côte d'Azur region in Southeastern France.

With an area of 205.55 km2 (79.36 sq mi), the commune of Saint-Paul-sur-Ubaye is the largest commune in the Alpes-de-Haute-Provence department by surface area.

It is located in the department's northeastern part, on the departmental border with Hautes-Alpes.

[4] St. Paul sur-Ubaye has a subarctic climate (Dfc)